Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø25mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ25 mm
- Full stroke30 mm
- Port sizeM5×0.8
- Adjuster threadM10×1.25
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S
The AirTAC ACQJ25X30-20S is a double-acting JIS compact cylinder with an external extend stop mechanism. An M10x1.25 threaded adjuster and lock nut let you set the forward end position anywhere in a 10 to 30 mm usable range. The base full stroke is 30 mm, and the 20 mm window dictates how far the extension can be shortened. The return stroke remains completely unaffected.
Because the 25 mm piston area is unchanged, output force is identical to a standard ACQ unit. You get 245.4 N of push at 0.5 MPa. The body uses a compact C-clip riveted design with a fixed TPU elastomer bumper at each end. The -S suffix means a built-in piston magnet is present, allowing detection by reed or solid-state electronic switches via the integrated sensor grooves.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø25 mm |
| Full stroke | 30 mm |
| Adjuster thread | M10×1.25 |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Rod thread | M6×1.0 (F) / M10×1.25 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 189 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×30 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC lathe fixture without machining new spacers or swapping cylinder bodies.
Product Changeover Guides
Quickly reposition the extend end stop on a packaging line diverter when switching between different carton widths.
Prototype End Positions
Test various pressing depths on a small assembly rig by turning the external M10x1.25 adjuster screw to find the optimal travel.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S the Right Cylinder?
This 25 mm bore delivers 245.4 N push and 188.9 N pull at 0.5 MPa. If your application requires less force, step down to the 20 mm bore (157.1 N push). If you need more thrust, step up to the 32 mm bore (402.1 N push). Choose this adjustable model only if your fixture requires on-the-fly end-position tuning; otherwise, a fixed-stroke ACQ cylinder suffices. When ordering, verify the 30 mm full stroke, the 20 mm adjuster window, the -S magnet option, and the standard female M6x1.0 rod-end thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X30-20S FAQ
It provides 245.4 N push and 188.9 N pull at 0.5 MPa, 343.6 N push at 0.7 MPa, and a maximum push of 50 kgf at 1.0 MPa. The usable extend range is 10 to 30 mm, set by subtracting the 20 mm window from the 30 mm full stroke.
No, the adjuster only limits the extend length, so force remains identical to a standard ACQ. Deceleration is handled by a fixed elastomer bumper at each end. Note that a plain ACQ does not hold loads on air loss; use an external rod lock for fail-safe holding.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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